WO2021129784A1 - Circuit d'entraînement pour entraîner un dispositif à del, et circuit à del - Google Patents

Circuit d'entraînement pour entraîner un dispositif à del, et circuit à del Download PDF

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Publication number
WO2021129784A1
WO2021129784A1 PCT/CN2020/139248 CN2020139248W WO2021129784A1 WO 2021129784 A1 WO2021129784 A1 WO 2021129784A1 CN 2020139248 W CN2020139248 W CN 2020139248W WO 2021129784 A1 WO2021129784 A1 WO 2021129784A1
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WO
WIPO (PCT)
Prior art keywords
control node
constant current
diode
resistor
driving circuit
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Application number
PCT/CN2020/139248
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English (en)
Chinese (zh)
Inventor
刘肖峰
刘路
Original Assignee
菲尼克斯亚太电气（南京）有限公司
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Publication of WO2021129784A1 publication Critical patent/WO2021129784A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current

Definitions

  • the invention relates to the technical field of industrial control circuits, in particular to a driving circuit and an LED circuit for driving an LED device.
  • LED indicator lights are divided into different types and types according to the input voltage in the power grid. Generally, they are compatible with AC and DC power supply systems through the design of capacitor step-down circuits, rectifier circuits and LED indicator circuits.
  • the problems brought by this design scheme are obvious. For example, the product uses a narrow voltage range, poor compatibility, and a variety of design schemes, which in turn leads to an increase in the production and management costs of the enterprise.
  • the traditional resistance step-down circuit will cause the product to heat up, and long-term use will cause the device to age and affect the service life of the product.
  • the purpose of the present invention is to provide a driving circuit and an LED circuit for driving LED devices, which are designed around the LED constant current driving chip to realize an ultra-wide AC and DC input voltage range, and solve the problem of narrow voltage range and poor compatibility. The problem.
  • the present invention provides a driving circuit for driving an LED device, which is characterized in that the driving circuit includes: an input unit for receiving an external power signal, including a first input terminal and a second input terminal; The filter unit is connected between the first input terminal and the second input terminal, and is used to rectify and filter the external power signal; the PWM control constant current unit includes a constant current control chip, which is connected to the rectifier filter unit Between the positive and negative poles of the output terminal and in series with the LED device, used to stabilize and stabilize the LED device; and an output voltage and current adjustment unit connected between the PWM control constant current unit and the LED device, including a ninth A control node, a tenth control node, a fifth resistor, and a Zener diode, the ninth control node is coupled to the positive terminal of the LED device, the positive terminal of the Zener diode and one end of the fifth resistor, the tenth control node The negative terminal of the LED device, the other terminal of the fifth resistor, and the negative output terminal of
  • first input terminal is a positive terminal
  • second input terminal is a negative terminal
  • the PWM control constant current unit also includes a MOSFET tube built in the constant current control chip, and the constant current control chip includes an HV pin, a CS pin, a Dra pin, and a GND pin.
  • the MOSFET The gate of the tube is connected to the constant current control chip, the Dra pin is coupled to the drain of the MOSFET, and the CS pin is coupled to the source of the MOSFET.
  • the PWM control constant current unit further includes: a fifth control node connected to the negative output terminal of the rectifying and filtering unit; and a third resistor, one end of the third resistor is connected to the fifth control node, and the third resistor The other end of is connected to the CS pin.
  • the PWM control constant current unit further includes: a sixth control node connected to the positive output terminal of the rectifying and filtering unit; and a fourth resistor, one end of the fourth resistor is connected to the sixth control node, and the fourth resistor The other end of is connected to the HV pin.
  • the PWM control constant current unit further includes: a seventh control node, which is connected to the Dra pin; an inductor, which is connected between the seventh control node and the tenth control node; and an eighth control node, which is connected to the Dra pin.
  • the negative terminal of the Zener diode is coupled; and a diode, the positive terminal of the diode is coupled to the seventh control node, and the negative terminal of the diode is coupled to the eighth control node.
  • the PWM control constant current unit further includes: a ground point connected to the GND pin.
  • the constant current control chip further includes a power generator, a reference source, a constant current modulator, a PWM generator, and a PWM driver that are connected in sequence.
  • the constant current modulator is connected to the PWM driver, and the HV pin is coupled to the A power generator, the CS pin is coupled to the constant current modulator, and the gate of the MOSFET is coupled to the PWM driver.
  • the rectification and filtering unit includes a third control node, a fourth control node, a rectification module, and a filtering module, and the rectification module and the filtering module are connected between the third control node and the fourth control node.
  • the rectifier module includes a first sub-diode, a second sub-diode, a third sub-diode, and a fourth sub-diode that are connected
  • the filter module includes a first capacitor coupled to the third control node And the fourth control node, wherein the node connecting the negative terminal of the first sub-diode and the positive terminal of the second sub-diode is connected to the first input terminal, the negative terminal of the second sub-diode and the third
  • the connection point connected to the negative terminal of the sub-diode is connected to the third control node, the connection point connected to the positive terminal of the third sub-diode and the negative terminal of the fourth sub-diode is connected to the second input terminal, and the connection point of the fourth sub-diode is connected to the second input terminal.
  • the connection point connecting the positive terminal of the first sub-diode and the positive terminal of the first sub-diode is connected to the fourth control node.
  • the driving circuit further includes an overvoltage protection unit connected between the input unit and the rectifying and filtering unit.
  • the overvoltage protection unit includes a first control node, a second control node, a first resistor, a second resistor, and a first variable resistor, and the first variable resistor is coupled to the first control node and the first variable resistor. Between the two control nodes, two ends of the first resistor are respectively connected to the first input terminal and the first control node, and two ends of the second resistor are respectively connected to the second input terminal and the second control node.
  • the LED device includes one or more LED indicators.
  • the external power signal is an AC and DC voltage with a voltage range of 20.4V to 264V.
  • the present invention also provides an LED circuit, including: the above-mentioned driving circuit; and an LED device connected to the driving circuit.
  • the LED device includes at least one LED indicator.
  • the present invention provides a driving circuit for driving an LED device and an LED circuit.
  • the driving circuit includes an input unit, a rectifier filter unit, a PWM control constant current unit, and an output voltage and current adjustment unit.
  • the input unit is used for receiving The external power signal
  • the rectification and filtering unit is used to rectify and filter the external power signal
  • the PWM control constant current unit is used to stabilize and stabilize the LED device
  • the output voltage and current adjustment unit includes a fifth resistor and a Zener diode
  • the LED device is connected in parallel with the fifth resistor and then connected in series with the Zener diode, and the positive terminal of the Zener diode is connected to the positive terminal of the LED device.
  • the driving circuit of the present invention is designed around the LED constant current driving chip, realizes an ultra-wide AC and DC input voltage range, and solves the problems of narrow use voltage range and poor compatibility.
  • Fig. 1 is a schematic circuit diagram of a driving circuit for driving an LED device according to the present invention
  • FIG. 2 is a schematic diagram of the module structure of a constant current control chip in a driving circuit for driving an LED device according to the present invention.
  • FIG. 1 is a schematic circuit diagram of a driving circuit for driving an LED device according to an embodiment of the present invention.
  • the driving circuit 100 for driving the LED device 200 according to the embodiment of the present invention includes an input unit 10, a rectifying and filtering unit 30, a PWM control constant current unit 40, and an output voltage and current adjustment unit 50.
  • the input unit 10 is used to receive an external power signal, and includes a first input terminal L and a second input terminal N; the rectifying and filtering unit 30 is connected between the first input terminal L and the second input terminal N, and is used for receiving external power signals.
  • the power signal is rectified and filtered;
  • the PWM control constant current unit 40 includes a constant current control chip IC1, which is connected between the positive and negative electrodes of the output end of the rectification and filtering unit 30 and is connected in series with the LED device 200 to stabilize and stabilize the LED device 200.
  • the output voltage and current adjustment unit 50 is connected between the PWM control constant current unit 40 and the LED device 200, and includes a ninth control node 109, a tenth control node 110, a fifth resistor R5 and a Zener diode ZD1, and a ninth control node 109 is coupled to the positive terminal of the LED device 200, the positive terminal of the Zener diode ZD1, and one end of the fifth resistor R5.
  • the tenth control node 110 is coupled to the negative terminal of the LED device 200, the other end of the fifth resistor R5, and the PWM control constant
  • the negative output terminal of the current unit 40 and the negative terminal of the Zener diode ZD1 are coupled to the positive output terminal of the PWM control constant current unit 40.
  • the driving circuit 100 used to drive the LED device 200 in the embodiment of the present invention addresses the problem of insufficient ability of the existing chip to drive the industrial LED device, especially when the on-voltage and current of the industrial LED device are small, the existing LED constant current
  • the drive control chip cannot be driven under the AC/DC wide voltage input.
  • the output voltage and current adjustment circuit is innovatively designed.
  • the method of using the Zener diode ZD1 in series with the LED device can improve the drive by adjusting the parameters of the Zener tube Chip output voltage value, so as to solve the problem of small turn-on voltage of the chip driving LED device; similarly, using the fifth resistor R5 in parallel with the LED device can not only increase the output current of the driving chip, but also adjust the resistance of the resistor. Limiting the current flowing through the LED lamp, thereby changing the luminous brightness of the LED lamp, meeting the application scenarios of multi-specification LED lamp beads, and also solving the problem of small conduction current of the existing chip-driven industrial LED device.
  • the first input terminal L is the positive terminal
  • the second input terminal N is the negative terminal.
  • the subsequent circuit design is based on this, but it is not limited to this. In practical applications, the first input terminal may also be The negative terminal and the second input terminal are the positive terminal.
  • the present invention only uses this example as an illustration of the overall circuit principle.
  • the external power signal is an AC/DC (AC/DC) voltage with an input voltage range of 20.4V to 264V, that is, the present invention can realize an ultra-wide AC and DC input voltage range, reducing the lower limit of the power input range .
  • AC/DC AC/DC
  • the PWM control constant current unit 40 further includes a MOSFET tube M1.
  • the gate GATE of the MOSFET tube M1 is connected to the constant current control chip IC1.
  • the MOSFET tube M1 in this embodiment is built on the constant current control chip IC1.
  • the constant current control chip IC1 includes HV pin, CS pin, Dra pin and GND pin.
  • the Dra pin is coupled to the drain of the MOSFET M1, and the CS pin is coupled to the MOSFET.
  • the constant current control chip IC1 more details will be described later.
  • the PWM control constant current unit 40 further includes a fifth control node 105, a sixth control node 106, a third resistor R3, and a fourth resistor R4.
  • the fifth control point 105 is connected to the rectifier The negative output terminal of the filter unit 30 (the fourth control point 104 described below), and the sixth control node 106 is connected to the positive output terminal of the rectifier filter unit 30 (the third control point 103 described below).
  • One end of the third resistor R3 is connected to the fifth control node 105, and the other end of the third resistor R3 is connected to the CS pin of the constant current control chip IC1 for adjusting the output current, that is, the output current of the constant current control chip IC1
  • the size adjustment can be achieved by changing the value of the third resistor R3 (sampling resistor) connected to the pin of the constant current control chip IC1CS.
  • One end of the fourth resistor R4 is connected to the sixth control node 106, and the other end of the fourth resistor R4 is connected to the HV pin of the constant current control chip IC1 for adjusting the input voltage, that is, the HV pin is used as a voltage input terminal to receive
  • the aforementioned AC and DC voltage flows into the constant current control chip IC1 through the rectifying and filtering unit 30.
  • the PWM control constant current unit 40 further includes a seventh control node 107, an inductor L1, an eighth control node 108, and a diode D2.
  • the seventh control node 107 is connected to the Dra pin of the constant current control chip IC1.
  • L1 is connected between the seventh control node 107 and the tenth control node 110
  • the eighth control node 108 is coupled to the negative terminal of the Zener diode ZD1
  • the positive terminal of the diode D2 is coupled to the seventh control node 107
  • the negative terminal of the diode D2 The pole is coupled to the eighth control node 108.
  • the MOSFET M1 is integrated inside the constant current control chip IC1, and the Dra pin of the constant current control chip IC1 is connected to the inductor L1, and the on and off of the MOSFET M1 is adjusted by changing the inductance of the inductor L1 Time and operating switching frequency, etc., thereby reducing chip switching losses caused by wide voltage range input, and reducing chip heating problems.
  • the positive terminal of the diode D2 is respectively coupled to the Dra pin and the inductor L1 through the seventh control point 107. The diode D2 is used to adjust the performance of the tank circuit and prevent the current from flowing back.
  • MOSFET M1 Metal Oxide Semiconductor Field Effect Transistor, that is, metal oxide semiconductor field effect transistor
  • MOSFET tube M1 Metal Oxide Semiconductor Field Effect Transistor, that is, metal oxide semiconductor field effect transistor
  • the PWM control constant current unit 40 further includes a ground point G, which is connected to the GND pin of the constant current control chip IC1.
  • the constant current control chip IC1 also includes a power generator, a reference source, a constant current modulator, a PWM generator, and a PWM driver that are connected in sequence.
  • the constant current modulator and the PWM driver are connected, and the HV pin is coupled
  • the power generator, the CS pin is coupled to the constant current modulator, and the gate GATE of the MOSFET M1 is coupled to the PWM driver.
  • the constant current control chip IC1 in this embodiment includes eight pins, of which the first pin is the HV pin; the second pin and the third pin are both NC pins, and the two are interconnected; The four pins are CS pins; the fifth and sixth pins are both Dra pins and are commonly coupled to the seventh control point 107. The seventh and eighth pins are GND pins and are commonly connected to the ground point G.
  • the model of the constant current control chip IC1 is LIS9411, but the invention is not limited to this.
  • the MOSFET tube M1 is an N-channel MOSFET tube.
  • Start-up and lock-out Start-up and power supply technology is adopted, and the bus voltage is connected through the HV pin (ie the first pin).
  • the internal high-voltage module provides start-up current and working current without the need for VCC capacitors.
  • the chip's VDD is first charged by the line voltage through the high-voltage module. When the voltage on it reaches the threshold UVLO(off), the chip starts and begins to output pulses to drive the internal power switch. After startup, because the chip itself consumes very little power, it can be powered directly through the high-voltage module to maintain the VDD voltage at a certain value to ensure the normal operation of the IC.
  • UVLO Undervoltage lockout
  • Soft start After each start, the chip gradually establishes from the lowest operating frequency to the switching frequency required for the final constant current. The entire soft-start process is about 9ms. The soft start can suppress the current overshoot at startup, so as to reduce the stress that the LED bears at startup, thereby improving the life of the LED. On the other hand, soft-start can also suppress the voltage overshoot of the drain of the internal MOSFET during startup, thereby increasing system reliability.
  • Leading edge blanking The leading edge blanking function is integrated internally. In the 600ns before the switching tube is turned on, the interference signal of the CS pin (ie, the fourth pin) is shielded, which can prevent the internal switching tube from being turned off by mistake and ensure the stable operation of the system.
  • Over-temperature regulation The internal over-temperature regulation function is integrated to gradually reduce the output current when the drive power is overheated, thereby controlling the output power and temperature rise, and keeping the power temperature at the set value to improve the reliability of the system.
  • the overheating regulation temperature point is set at 145°C inside the chip.
  • CS open circuit protection The CS pin open circuit protection function is integrated internally. When the CS pin of the chip is open, the switch tube will be turned off and enter the automatic restart protection mode. When the error condition disappears, the system automatically resumes its normal working state.
  • Output short-circuit protection With output short-circuit protection function. Once the output is short-circuited and lasts only about 500us, the chip will turn off the switch and enter the lock mode. At this time, the system has extremely low power consumption and almost no heat, so it is very safe and reliable. When the short-circuit state disappears, the bus voltage needs to be completely powered off, and the system will be restored to normal working state after being powered on again.
  • the voltage input range of the constant current control chip IC1 in the PWM control constant current unit 40 of this embodiment can meet AC/DC between 20.4V and 264V, and the startup and power supply technology is used inside the chip, using open loop
  • the peak current mode control method can achieve precise current control of the input voltage in a very wide range.
  • the constant current control chip IC1 integrates a high-voltage MOSFET tube M1, which makes it possible to achieve an ultra-wide voltage range input with very few peripheral components. Requirements.
  • the rectification and filtering unit 30 includes a third control node 103, a fourth control node 104, a rectification module and a filtering module, and the rectification module and the filtering module are connected between the third control node 103 and the fourth control node 104.
  • the rectifier module includes a bridge rectifier circuit BD1 composed of a first sub-diode 31, a second sub-diode 32, a third sub-diode 33, and a fourth sub-diode 34 connected to each other.
  • the filter module includes a first capacitor C1, wherein ,
  • the first capacitor C1 is coupled between the third control node 103 and the fourth control node 104, and the node connecting the negative terminal of the first sub-diode 31 and the positive terminal of the second sub-diode 32 is connected to the first input terminal L,
  • the point where the negative terminal of the second sub-diode 32 and the cathode terminal of the third sub-diode 33 are connected is connected to the third control node 103, and the point where the positive terminal of the third sub-diode 33 and the negative terminal of the fourth sub-diode 34 are connected is connected
  • the second input terminal N, the connection point between the positive terminal of the fourth sub-diode 34 and the positive terminal of the first sub-diode 31 is connected to the fourth control node 104 of the first capacitor C1.
  • the rectifier filter unit 30 of this embodiment uses the bridge rectifier circuit BD1 to convert the input AC power into pulsating DC power, and then uses the first capacitor C1 to filter out the AC pulsating components in it to obtain a clean DC voltage and reduce the impact of the AC components. Interference of the subsequent circuit.
  • the rectifier filter unit in this embodiment is a combination of a bridge rectifier circuit and a capacitor, but in other embodiments, it can be increased, decreased or replaced accordingly as needed.
  • the driving circuit 100 further includes an overvoltage protection unit 20, and the overvoltage protection unit 20 is connected between the input unit 10 and the rectifying and filtering unit 30.
  • the overvoltage protection unit 20 includes a first control node 101, a second control node 102, a first resistor R1, a second resistor R2, and a first variable resistor RV1.
  • the first variable resistor RV1 is coupled to the first control node 101 and Between the second control node 102.
  • the two ends of the first resistor R1 are respectively connected to the first input terminal L and the first control node 101, and the two ends of the second resistor R2 are respectively connected to the second input terminal N and the second control node 102.
  • the node connecting the negative terminal of the first sub-diode 31 and the positive terminal of the second sub-diode 32 in the rectifying and filtering unit 30 is coupled to the first control node 101
  • the third The node connecting the positive terminal of the sub-diode 33 and the negative terminal of the fourth sub-diode 34 is coupled to the second control node 102.
  • the first variable resistor RV1 is a varistor.
  • the overvoltage protection unit 20 described in this embodiment effectively eliminates the high-energy surge voltage in the input voltage, and has the characteristics of fast response time to transient overvoltage, no freewheeling, and low residual voltage. Protective function.
  • the LED device includes at least one LED indicator.
  • the present invention also provides an LED circuit, including the driving circuit 100 described in all the above embodiments and the LED device 200 connected to the driving circuit 100.
  • the driving circuit and LED circuit for driving the LED device provided by the present invention innovatively design the output voltage and current adjustment circuit, using the method of connecting the zener diode ZD1 in series with the LED device and adjusting the zener tube
  • the parameter can increase the output voltage value of the driver chip, so as to solve the problem of the smaller turn-on voltage of the chip-driven LED device; similarly, the method of using the fifth resistor R5 in parallel with the LED device can both increase the output current of the driver chip and pass the Adjust the resistance value to limit the current flowing through the LED lamp, thereby changing the brightness of the LED lamp, meeting the application scenarios of multi-specification LED lamp beads, and realizing a constant current industry with an ultra-wide input voltage range of 20.4V to 264V AC and DC
  • the LED indicator driving circuit simultaneously solves the problem of insufficient driving ability of the existing chip to drive industrial LED lights under low current and low voltage.
  • the voltage input range of the constant current control chip IC1 in the PWM control constant current unit of the present invention can meet AC/DC 20.4V-264V.
  • the chip uses start-up and power supply technology, and uses the open-loop peak current mode control method. , It can make the input voltage achieve precise current control in a very wide range.
  • the constant current control chip IC1 integrates a high-voltage MOSFET tube, which makes it possible to achieve ultra-wide voltage range input requirements with very few peripheral components, which reduces The product design cost saves the product structure design space.

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Abstract

Circuit d'entraînement (100) pour entraîner un dispositif à DEL (200), et un circuit à DEL. Le circuit d'entraînement (100) comprend une unité d'entrée (10), une unité de filtre de redresseur (30), une unité de courant constant de commande PWM (40), et une unité de réglage de courant de tension de sortie (50) ; l'unité d'entrée (10) est utilisée pour recevoir un signal d'alimentation externe ; l'unité de filtre de redresseur (30) est utilisée pour redresser et filtrer le signal d'alimentation externe ; l'unité de courant constant de commande PWM (40) est utilisée pour la stabilisation de tension et la stabilisation de courant du dispositif à DEL (200) ; l'unité de réglage de courant de tension de sortie (50) comprend une cinquième résistance (R5) et une diode Zener (ZD1) ; le dispositif à DEL (200) est connectée en parallèle à la cinquième résistance (R5) puis connectée en série à la diode Zener (ZD1) ; la borne d'électrode positive de la diode Zener (ZD1) est connectée à la borne d'électrode positive du dispositif à DEL (200). Le circuit d'entraînement (100) est conçu autour d'une puce d'entraînement à courant constant de DEL, obtient des plages de tension d'entrée à courant continu et à courant alternatif ultra-larges, et résout les problèmes d'une plage de tension étroite et d'une mauvaise compatibilité.
PCT/CN2020/139248 2019-12-26 2020-12-25 Circuit d'entraînement pour entraîner un dispositif à del, et circuit à del WO2021129784A1 (fr)

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CN201911364035.2A CN113056058A (zh) 2019-12-26 2019-12-26 用于驱动led装置的驱动电路及led电路
CN201911364035.2 2019-12-26

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CN115967707A (zh) * 2022-12-06 2023-04-14 浙江桃园智能科技有限公司 一种数字通信协议驱动电路
CN116887478A (zh) * 2023-08-01 2023-10-13 广州威博智能科技股份有限公司 一种同步整流汽车led灯驱动电路

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CN101997296A (zh) * 2009-08-24 2011-03-30 庞庆宇 一种简易的过压保护装置电路
CN201657400U (zh) * 2009-11-26 2010-11-24 惠州大景照明控制有限公司 一种led调光控制器
KR101116188B1 (ko) * 2011-05-20 2012-03-06 주식회사 서울스테이지라이팅 Ｌｅｄ 구동 회로 및 ｌｅｄ 조도 제어 방법
CN102438376A (zh) * 2011-12-20 2012-05-02 成都成电硅海科技股份有限公司 Led恒流驱动电源电路
CN103442501A (zh) * 2013-09-12 2013-12-11 江华 强制恒流源调光的led灯
CN109831845A (zh) * 2018-12-27 2019-05-31 中山市夸克光电科技有限公司 一种多功能led感应灯控制器

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CN113747633A (zh) * 2021-08-27 2021-12-03 江西汇荣实业有限公司 一种安全低压led球泡灯
CN115967707A (zh) * 2022-12-06 2023-04-14 浙江桃园智能科技有限公司 一种数字通信协议驱动电路
CN115967707B (zh) * 2022-12-06 2023-10-20 浙江桃园智能科技有限公司 一种数字通信协议驱动电路
CN116887478A (zh) * 2023-08-01 2023-10-13 广州威博智能科技股份有限公司 一种同步整流汽车led灯驱动电路
CN116887478B (zh) * 2023-08-01 2024-03-29 广州威博智能科技股份有限公司 一种同步整流汽车led灯驱动电路

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